Sushi Skillz?

Ok, trying to make some home made rolls. I can put down large amounts of "good" sushi so I figure the problem is either in my prep or the products I used. Basically I get an off feeling in the gut after 6-7 rolls (one sheet).

The factor that seems to be hurting me (hitting the stomach kinda weird) is the nori. I ate the left over rice with all the other ingredients with no problemo. Eat it in the roasted seaweed wrap and my stomach feels a bit off for a few hours. Second time this happened with my homemade stuff.

So is there something I'm missing in the prep of the seaweed wrap? Have no problems with it when I eat out, and I absolutely LOVE seaweed salad as an appetizer.